JP2002185026A - Method for manufacturing solar battery module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture, with excellent yield, the solar battery module of a high merchandise value with excellent protective performance by a sealing film serving also as a back cover material, by preventing the generation of the wrinkles of the sealing film serving also as the back cover material in a sealing process at the time of manufacturing the solar battery module, by using the sealing film serving also as the back cover material for which an adhesive resin layer is formed on one surface of a main body part, and sealing a cell for a solar battery between the sealing film serving also as the back cover material and a surface side protective member. SOLUTION: The cell 14 for the solar battery is interposed and laminated between the sealing film 1 serving also as the back cove material for which the body 4 and the adhesive resin layer 5 on one surface of the main body 4 are formed and the surface side protective member 11. A laminate 20 is housed inside a non-air-permeable bag, the inside of the bag is deaerated by being evacuated and the laminated body 20 is pressurized further. The rising speed of pressurizing force in a pressurizing process after deaeration is turned to 9×102 Pa/sec or lower.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a solar cell module by sealing a solar cell between a front side protection member and a back side protection member, and more particularly to a method of manufacturing a solar cell module. In manufacturing the solar cell module by sealing the solar cell between the back surface side protective member / sealing film in which the adhesive resin layer is formed on one surface of the portion and the front side protective member, The present invention relates to a method for preventing the occurrence of wrinkles in a sealing film also serving as a member and producing a solar cell module having a high commercial value and excellent in protection performance by the sealing film also serving as a back surface with a high yield.

[0002]

2. Description of the Related Art In recent years, solar cells that directly convert sunlight into electric energy have attracted attention from the viewpoints of effective use of resources and prevention of environmental pollution, and their development has been promoted.

As shown in FIG. 2, a solar cell generally comprises an ethylene-vinyl acetate copolymer (EVA) between a front transparent protective member 11 on the light receiving surface side and a rear protective member (back cover material) 12 on the light receiving surface side. The sealing film of the resin films 13A and 13B allows the solar cell, that is, the power generating element 1 such as silicon,
4 is sealed.

[0004] Such a solar cell module 10 has a surface-side transparent protective member 11 such as a glass substrate, an EVA for a sealing film.
Film 13A, silicon power generating element 14, EV for sealing film
It is manufactured by laminating the A resin film 13B and the back cover material 12 in this order, and by heating and melting and cross-linking and curing EVA to bond and integrate.

[0005] Such a back cover material for a solar cell module is designed to reduce the weight and thickness of the solar cell module.
It is also required that it itself be lightweight and thin, but furthermore, it is required to have durability and moisture resistance for protecting internal components such as power generation elements and wiring from external force, moisture and the like. That is, since the solar cell module is usually installed outdoors, in addition to having long-term durability, the back cover material has an internal power generation element due to moisture or water permeation,
In order to prevent rusting of components such as conductive wires and electrodes, it is extremely important to have excellent moisture proof properties.

Conventionally, as a back cover material of a solar cell module, a laminated film in which a metal foil such as aluminum or galvanized iron as a moisture-proof layer is sandwiched between two resin films is provided.

However, in a conventional back cover material using a metal foil, when applied to a solar cell module,
The current may leak. Further, there is a possibility that a short circuit may occur with a metal foil when a projection such as a power generation element or an internal wiring penetrates the resin film. From these issues and the environment,
Instead of using a metal foil, a laminate consisting only of a resin film was developed, but this laminate film was insufficient in moisture resistance.

A sealing film which also solves the above-mentioned conventional problems and is also used as a back cover material for a solar cell used as a sealing film also serving as a protective member on the back side of the solar cell, and is lightweight, thin and moisture-proof. As a sealing film also used as a back cover material for a solar cell, which is excellent in durability, has high insulation properties, and has no problem of short circuit of internal wiring or leakage current, the applicant of the present invention has shown in FIG.
As shown in FIG. 1, a main body 4 is formed by laminating and integrating two heat-resistant and weather-resistant films 2 and 2 via a moisture-proof film 3 and an adhesive layer 5 provided on one surface of the main body 4. The present inventors have proposed a sealing film for a back cover material for a solar cell, which is a sealing film for a back cover material for a solar cell, wherein the moisture permeability of the sealing film is 1.0 g / m ² / day or less (Japanese Patent Application 200
0-201202. Hereinafter, it is referred to as “first application”. ). In FIG. 2, reference numeral 6 denotes an adhesive.

[0009] The sealing film 1, which is also used as a back cover material for a solar cell, is made of a laminated film, so that it is lightweight and thin. Moreover, the moisture permeability is 1.0 g / m ² / day or less,
Since it is extremely excellent in moisture permeability, it can obtain a high moisture-proof property, and since it is insulative, there is no problem of short circuit or leak current.

In order to manufacture a solar cell module using this sealing film for back cover material for solar cells, for example,
As shown in FIG. 1, a glass plate as a front-side transparent protective member 11, an EVA resin film 13A for sealing, a cell for a solar cell such as a silicon power generation element 14, and a sealing film 1 also serving as a back cover material are laminated in this order. Then, the laminate 20 is put in a non-breathable bag, the inside of the bag is evacuated, and then heated and pressurized.
Specifically, degassed by evacuating the inside of 1 to 10 minutes bag 50 to 170 ° C., after almost a 0MPa the bag pressure, 50 to 170 ° C., pressure 1.013 × ^{10 -2} ~
By heating and pressing at 1.013 × 10 ⁻¹ MPa for 1 to 30 minutes, the solar cell is sealed and integrated to seal the solar cell.

[0011]

When the solar cell is sealed in this way, the back cover material / sealing film 1 of the manufactured solar cell module is shown in FIG. 4 (a) (plan view). ), (B) (cross-sectional view along line BB in FIG. 4 (a))
As shown in (1), deep wrinkles S are generated on the surface of the back cover material / sealing film 1, which impairs the appearance of the product, and in a severe case, the protection effect of the back cover material / sealing film 1 is also deteriorated. there were.

The cause of the generation of the wrinkles S is as follows at the time of sealing.
The back cover material / sealing film 1 is in a floating state peculiar to the bonded product, is restrained by the EVA resin of the adhesive resin layer in a displaced state, is promoted by thermal shrinkage of the EVA, and is pressurized in this state. It is believed that.

This problem is particularly remarkable in a large-sized solar cell module whose one side exceeds 1 m.

The present invention solves such a problem and uses a back cover material / sealing film in which an adhesive resin layer is formed on one surface of a main body. In manufacturing a solar cell module by sealing a solar cell between members, a back cover material / sealing film is prevented by preventing wrinkles of the back cover material / sealing film in the sealing step. It is an object of the present invention to provide a method for manufacturing a solar cell module which is excellent in protection performance by the solar cell module and is capable of manufacturing a solar cell module having high commercial value with high yield.

[0015]

The method of manufacturing a solar cell module according to the present invention is directed to a method of manufacturing a solar cell module in which a solar cell is sealed between a front side protection member and a back side protection member. A solar cell between the body portion and the back surface side protection member / sealing film (back cover material / sealing film) in which an adhesive resin layer is formed on one surface of the body portion; After laminating with intervening cells, this laminated body is stored in a non-breathable bag, and after evacuating the inside of the bag,
In the method for manufacturing a solar cell module having a step of pressurizing the laminate, the rate of pressure increase in the pressurizing step after the degassing is 5.9 × 10 ² Pa / sec or less.

In sealing the solar cell, the rate of pressure increase in the pressurizing step after degassing is 5.9 × 10 ² Pa
By setting the pressure rising rate as low as / sec or less, it is possible to prevent wrinkles of the back cover material / sealing film in the sealing step. The effect of preventing the generation of wrinkles according to the present invention is as follows.
It is presumed that the back cover material / sealing film restrained by the adhesive resin such as resin can be pressed while gradually flattening.

In the present invention, the pressure increasing speed is particularly 3.38.
It is preferably from × 10 ^{2 to} 5.9 × 10 ² Pa / sec.

The maximum pressing force by pressing is 4.05 ×
It is preferably 10 ^{4 to} 1.013 × 10 ⁵ Pa, and the time of the pressurizing step including the pressure increasing step is preferably 1 to 10 minutes.

The adhesive resin of the back cover material / sealing film used in the present invention is preferably an EVA resin, and the main body is preferably formed by laminating and integrating two heat-resistant and weather-resistant films via a moisture-proof film. .

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the method for manufacturing a solar cell module according to the present invention will be described below in detail with reference to the drawings.

FIG. 5 is a graph showing a time schedule of the inner pressure of the bag and the pressure in the sealing step according to the present invention.

The method of the present invention is used in the pressurizing step after degassing.
5.9 × 10 ⁴Pa / sec or less
Except that the method shown in FIG.
can do.

That is, the laminate 20 shown in FIG. 1 is housed in a non-breathable bag made of rubber or the like, and the inside of the bag is evacuated. The temperature of this deaeration step is 90 to 150 ° C, and the deaeration time is 1 to 5
The air pressure inside the bag is reduced to approximately 0 Pa by degassing as shown in FIG.

Next, the laminated body 20 is pressed in the laminating direction by pressing the bag. In the pressurizing step of the pressurizing step, as shown in FIG.
9 × 10 ² Pa / sec or less. If the pressure rising speed exceeds 5.9 × 10 ² Pa / sec, the effect of preventing wrinkles according to the present invention cannot be sufficiently obtained. However, if the rate of pressure increase is too slow, it takes time to increase the pressure, and the production efficiency is reduced. For this reason, the boosting speed is 3.38 × 1
It is preferable to set it to 0 ^{2 to} 5.9 × 10 ² Pa / sec.

The maximum pressure (P in FIG. 5) due to this pressurization is 4.05 × 10 ^{4 to} 1.013 × 10 ⁵ Pa, especially 7.09 × 10 ^{4 to} 1.013 × 10 ⁵ Pa. Is preferred. If the pressure is excessively high, the solar cell may be damaged. If the pressure is excessively low, poor sealing may occur. In addition, the time (T in FIG. 5) and the heating temperature of the pressurizing step including the pressurizing step differ depending on the type of the adhesive resin used, but are generally 1 to 10 times.
The temperature is preferably set to 90 to 150 ° C. in about minutes.

Such a method for manufacturing a solar cell module of the present invention can be easily implemented by adjusting the rate of pressure rise during pressurization with a normal vacuum laminator.

Next, each component of the solar cell module used in the present invention will be described.

The back cover material / sealing film used in the present invention is preferably formed by laminating two heat-resistant and weather-resistant films 2, 2 with a moisture-proof film 3 interposed therebetween, as shown in FIG. A back cover material / sealing film 1 having a main body part 4 formed into an adhesive and an adhesive layer 5 provided on one surface of the main body part 4.

As the moisture-proof film 3 for preventing intrusion of moisture from the back surface of the solar cell module, a base film mainly contains silicon oxide or the like by a CVD (chemical vapor deposition), PVD (reactive vapor deposition) method or the like. An inorganic oxide deposited film is used.

Aluminum oxide or silicon oxide is used as the inorganic oxide constituting the vapor-deposited inorganic oxide film as the moisture-proof layer. Silicon oxide is particularly preferred because of its excellent durability under wet heat conditions. is there.

The composition of the deposited silicon oxide film is SiO
A close state is common, but SiO _xAnd x is less than 1.7
, The moisture permeability gradually decreases in an endurance test or the like, and x = 1.
Those with more than 9 are disadvantageous in terms of productivity and cost.
Therefore, the silicon oxide deposited film SiO 2 as the moisture-proof layer_xset
It is desirable that x = 1.7 to 1.9.

If the film thickness of the vapor-deposited film is too thin, sufficient moisture-proof properties cannot be obtained. If the film thickness is too large, no further effect of improving the moisture-proof properties can be obtained. This film thickness is 100
It is preferable that the angle be in the range of 500 to 500, particularly 200 to 400.

On the other hand, the substrate film serving as a support for the moisture-proof film is not particularly limited as long as it is a heat-resistant film that can withstand the heat and pressure conditions at the time of producing the solar cell module. , Polytetrafluoroethylene (PTFE), 4-fluoroethylene-perchloroalkoxy copolymer (PFA), 4-fluoroethylene-6-propylenepropylene copolymer (FEP), 2-ethylene-4
-Fluororesin films such as fluorinated ethylene copolymer (ETFE), poly (3-chlorofluoroethylene (PCTFE), polyvinylidene fluoride (PVDF) and polyvinyl fluoride (PVF), and polyethylene terephthalate (PE)
Various resin films such as polyesters such as T), polycarbonate, polymethyl methacrylate (PMMA), and polyamide can be used. The base film may include two or more of these resins, or may be a laminated film of two or more films. Various additives such as a pigment and an ultraviolet absorber may be applied to the base film by impregnation, coating or kneading as necessary.

The thickness of such a base film is preferably about 5 to 200 μm from the viewpoint of durability, handleability, thinning and the like.

The heat-resistant and weather-resistant film 2 constituting the main body portion 4 by laminating and integrating such a moisture-proof film 3 intervenes to protect the moisture-proof film 3 and to improve the workability at the time of manufacturing a solar cell module. Provided for the purpose of
The heat-resistant and weather-resistant film 2 that withstands the heat and pressure conditions at the time of manufacturing the solar cell module and is particularly opposite to the adhesive layer 5 includes:
Since it becomes the outermost layer at the time of assembling the solar cell module, it is desired that the outermost layer does not deteriorate even under long-term outdoor exposure conditions. However, in general, those exemplified as the material of the base film described above can be used. The heat-resistant and weather-resistant films 2 and 2 may also contain two or more of the above-mentioned resins, similarly to the above-mentioned base film.
It may be a laminated film of two or more films. The heat-resistant and weather-resistant film may be provided with various additives such as a pigment, an ultraviolet absorber and a coupling agent by impregnation, coating or kneading as necessary.

The color of the heat-resistant and weather-resistant film 2 is not particularly limited, but a white color is preferable for improving the power generation efficiency, and black or each color is preferable for improving the appearance when installed in a house or the like. Dark colors are used.

The thickness of the heat-resistant and weather-resistant film 2 is 5 to 20 from the viewpoint of durability, handleability, thinning, and the like.
It is preferably about 0 μm.

The two heat-resistant and weather-resistant films 2, 2
Are not necessarily made of the same material, and may be made of different materials.

In particular, it is preferable to use a fluororesin film having excellent weather resistance for the heat-resistant and weather-resistant film on the outer surface side of the solar cell module, and to use a pigment and the like for the heat-resistant and weather-resistant film on the inner surface side. It is preferable to use a film that has been kneaded to impart reflective performance.

The body 4 is, in practice, an adhesive 6, 6 between the heat and weather resistant film 2 and the moisture proof film 3.
Through a method such as a dry lamination method or a heat press method.

As an adhesive used for laminating such a film, a urethane adhesive such as a polyester-based or polyether-based adhesive is generally used, but a polyether-based adhesive has a low initial adhesive strength and a heat resistance. Inferior,
The polyester type has a drawback that the heat resistance is good but the wet heat resistance is low. This is because these adhesive components
This is because the skeleton contains a -O- or -C = O-O- chain.

In order to solve this drawback, the heat- and weather-resistant films 2 and 2 and the moisture-proof film 3 were bonded to each other with a butadiene skeleton as a main chain and hydrogenated to prevent deterioration due to cleavage of double bonds. It is preferable to use a hydrogenated polybutadiene-modified urethane-based adhesive. It has a main chain of-
It becomes CH _2-, and the adhesive durability is greatly improved as compared with the conventional product.

The adhesive layer 5 formed on one surface of the main body portion 4 functions to seal the power generation element of the solar cell module and other internal components and to function as a cushioning material. A surface-side transparent protective member, a metal oxide conductive film such as ITO or the like, which is excellent in thermal adhesiveness to a silicon power generation element, can be easily bonded to form a composite,
Although there is no particular limitation, usually, an EVA-based resin, a PVB-based resin, or the like is used. Further, an adhesive resin such as a silicone-based, acrylic-based, butyl-based, or epoxy-based resin may be used.
In particular, EVA resins are frequently used in terms of workability and cost. The details of the EVA resin composition used for this EVA-based adhesive resin are as described below.

The thickness of the adhesive layer 5 is preferably about 0.1 to 1 mm.

The front side protective member 11 has a thickness of 1 to 5
A glass plate of about mm or a highly functional laminated film of about 10 to 200 μm in thickness can be used.

In FIG. 1, the front side protection member 11
Although the sealing EVA resin film 13A is used as the adhesive layer on the side, a PVA-based resin or another resin may be used for this resin film. As an adhesive resin film, an EVA-based resin film is particularly suitable from the viewpoints of adhesiveness and water resistance.

The EVA resin of the adhesive layer 5 of the sealing EVA resin film 13A and the back cover material / sealing film 1 has a vinyl acetate content of 5 to 50% by weight, preferably 1 to 50% by weight.
Those having 5 to 40% by weight are preferably used. If the vinyl acetate content is less than 5% by weight, there is a problem in weather resistance and transparency, and if it exceeds 40% by weight, mechanical properties are remarkably deteriorated, film formation becomes difficult, and sheet or film blocking occurs. Occurs. However, when transparency is not important, as in the case of the adhesive layer 5 of the back cover material / sealing film 1, a material having a vinyl acetate content smaller than the above range may be used.

The EVA resin composition for sealing is preferably blended with a cross-linking agent for improving the weather resistance so as to have a cross-linking structure. Generated organic peroxide is used, especially
Taking into account the stability at the time of blending, those having a decomposition temperature of 70 ° C. or more with a half-life of 10 hours are preferred. Examples of such organic peroxides include 2,5-dimethylhexane; 2,5-dihydroperoxide; 2,5-dimethyl-2,5-di (t-butylperoxy) hexane;
3-di-t-butyl peroxide; t-dicumyl peroxide; 2,5-dimethyl-2,5-di (t-butylperoxy) hexine; dicumyl peroxide;
α, α'-bis (t-butylperoxyisopropyl)
Benzene; n-butyl-4,4-bis (t-butylperoxy) butane; 2,2-bis (t-butylperoxy) butane; 1,1-bis (t-butylperoxy) cyclohexane; 1-bis (t-butylperoxy)
3,3,5-trimethylcyclohexane; t-butylperoxybenzoate; benzoyl peroxide and the like can be used. The amount of these organic peroxides is generally 5 parts by weight or less, preferably 1 to 3 parts by weight, based on 100 parts by weight of the EVA resin.

For the purpose of improving the adhesive strength, a silane coupling agent can be added to the EVA resin. Known silane coupling agents for this purpose include, for example, γ-chloropropyltrimethoxysilane; vinyltrichlorosilane; vinyltriethoxysilane; vinyl-tris- (β-methoxyethoxy) silane;
Methacryloxypropyltrimethoxysilane; β-
(3,4-ethoxycyclohexyl) ethyltrimethoxysilane; γ-glycidoxypropyltrimethoxysilane; vinyltriacetoxysilane; γ-mercaptopropyltrimethoxysilane; γ-aminopropyltrimethoxysilane; N-β- (amino Ethyl) -γ-aminopropyltrimethoxysilane. The amount of these silane coupling agents is generally EVA
It is 5 parts by weight or less, preferably 0.1 to 2 parts by weight, based on 100 parts by weight of the resin.

Further, the gel fraction of the EVA resin is improved,
A crosslinking aid can be added to the EVA resin to improve durability. Examples of the crosslinking auxiliary used for this purpose include known triaryl isocyanurate; trifunctional crosslinking auxiliary such as triallyl isocyanate;
Monofunctional crosslinking assistants such as K ester can also be mentioned. The amount of these crosslinking aids is generally equal to the amount of EVA resin 1
10 parts by weight or less, preferably 1 to 5 parts by weight with respect to 00 parts by weight
Parts by weight.

Further, for the purpose of improving the stability of the EVA resin, hydroquinone, hydroquinone monomethyl ether, p-benzoquinone, methylhydroquinone, and the like can be added. The amount of these compounds is generally 100 parts by weight of the EVA resin. 5 parts by weight or less.

Further, if necessary, a coloring agent, an ultraviolet absorber, an antioxidant, a discoloration inhibitor and the like can be added in addition to the above. Examples of the coloring agent include inorganic pigments such as metal oxides and metal powders, and organic pigments such as azo-based, phthalocyanine-based, azo-based, acidic or basic dye-based lakes. UV absorbers include 2-hydroxy-4-octoxybenzophenone; benzophenones such as 2-hydroxy-4-methoxy-5-sulfobenzophenone; 2- (2'-hydroxy-5-methylphenyl) benzotriazole; Benzotriazoles; phenyl salicylate; pt-
There are hindered amines such as butylphenyl salicylate. As anti-aging agents, amines; phenols;
Bisphenyl type; hindered amine type, for example, di-t-butyl-p-cresol; bis (2,2,6,6
-Tetramethyl-4-piperazyl) sebacate.

The method of the present invention uses the single crystal S shown in FIG.
In addition to bulk solar cell devices using i or polycrystalline Si, Si-based thin films, II-VI compounds (CdT
e), chalcopyrite thin film (CIS), organic semiconductors, and various other thin film solar cells.

[0054]

The present invention will be described more specifically below with reference to examples and comparative examples.

Example 1 As a heat- and weather-resistant film, a white pigment-kneaded polyester film ("U2" manufactured by Teijin DuPont Films Co., Ltd., thickness 38 μm) was used, and the other heat- and weather-resistant film was an ETFE film (Asahi Glass). 200 mm thick SiO _x (x = 1.8) as a moisture-proof layer on the surface of a PET film having a thickness of 12 μm between these heat-resistant and weather-resistant films using “Aflex” manufactured by 21 μm thickness.
A solar cell back cover comprising a moisture-proof film having a vapor-deposited film formed thereon, bonded and integrated with a hydrogenated polybutadiene-modified urethane-based adhesive, and further forming an EVA adhesive layer having a thickness of 50 μm on the polyester film side. According to the present invention, a solar cell module having the structure shown in FIG. 1 was manufactured using a sealing film for both materials (moisture permeability: 0.3 g / m ² / day).

The front side protective member 11 has a thickness of 3.5 m.
An EVA resin film 13A having a thickness of 800 μm was used as the sealing EVA resin film 13A.

Each of the back cover material / sealing film 1, the front side protective member 11, and the sealing EVA resin film 13A has a size of 951 mm (width) × 1108 mm (height). 155 m wide between the side protection member 11 and the sealing EVA resin film 13A.
A total of 42 solar cells (silicon power generation elements) of mx 150 mm in length, arranged in six rows in the horizontal direction and seven rows in the vertical direction, are laminated, and the laminated body 20 is put in a rubber bag and sealed with a vacuum laminator. Stopped. The conditions of the deaeration step and the pressurization step were as follows. [Deaeration step] Temperature: 150 ° C. Deaeration time: 1.5 minutes [Pressurization step] Temperature: 150 ° C. Boosting rate: 5.9 × 10 ² Pa / sec Maximum pressure P: 7.09 × 10 ⁴ Pa Pressure time T: 5.5 minutes

As a result, no wrinkles were generated in the sealing film also serving as the back cover material of the obtained solar cell module, and the solar cell module was of extremely high quality.

Comparative Example 1 In Example 1, the pressure increasing rate was 6.75 × 10 ² Pa /
Sealing was carried out in the same manner except that the time was set to sec to produce a solar cell module.

As a result, the back cover material / sealing film of the obtained solar cell module has a length of 500 to 800 m.
m, three wrinkles having a width of 2 to 3 mm were observed.

[0061]

As described in detail above, according to the method for manufacturing a solar cell module of the present invention, a back cover material / sealing film having an adhesive resin layer formed on one surface of a main body is used.
In manufacturing the solar cell module by sealing the solar cell between the back cover material / sealing film and the front side protective member, wrinkles of the back cover material / sealing film are generated in the sealing step. Thus, a solar cell module having excellent protection performance by the back cover material / sealing film and having high commercial value can be manufactured with high yield.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a sealing method using a back cover material / sealing film.

FIG. 2 is a cross-sectional view illustrating a method for manufacturing a conventional solar cell module.

FIG. 3 is a cross-sectional view showing a back cover material / sealing film of the prior application.

FIGS. 4A and 4B are views showing the occurrence of wrinkles in the back cover material / sealing film during sealing, wherein FIG. 4A is a plan view, and FIG. 4B is a view along line BB in FIG. It is sectional drawing.

FIG. 5 is a graph showing a time schedule of an air pressure in a bag and a pressing force in a sealing step in the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sealing film also used as back cover material 2 Heat-resistant and weather-resistant film 3 Moisture-proof film 4 Body part 5 Adhesive layer 6 Adhesive 10 Solar cell module 11 Surface-side transparent protective member 12 Back cover material 13A, 13B EVA resin film for sealing 14 Silicon power generation element

Claims (6)

[Claims] 1. A method for manufacturing a solar cell module in which a solar cell is sealed between a front side protection member and a back side protection member, comprising: a main body part and one surface of the main body part. The solar cell is interposed and laminated between the back surface side protective member / sealing film on which the adhesive resin layer is formed and the front side protective member, and the laminate is stored in a non-breathable bag. In the method for manufacturing a solar cell module, comprising a step of pressurizing the laminate after degassing the inside of the bag, the pressure increasing rate in the pressurizing step after the degassing is 5.
A method for manufacturing a solar cell module, wherein the pressure is 9 × 10 ² Pa / sec or less. 2. The method according to claim 1, wherein the boosting speed is 1.0.
× 10 ^{2 to} 5.9 × 10 ² Pa / sec. 3. The method according to claim 1, wherein the maximum pressing force is 1.013 × 10 ⁴ to 1.013 × 10 ^5.
A method for manufacturing a solar cell module, wherein the pressure is Pa. 4. The method according to claim 1, wherein the adhesive resin is an ethylene-vinyl acetate copolymer resin. 5. The method for manufacturing a solar cell module according to claim 1, wherein the time of the pressurizing step including the pressure increasing step is 1 to 30 minutes. 6. The solar cell module according to claim 1, wherein the main body is formed by laminating and integrating two heat-resistant and weather-resistant films via a moisture-proof film. Production method.